Whenever I hit the gas I hear this rattling/knocking noise coming from the right side of the engine (from the driver's perspective). It doesn't make this noise if I am parked, only when the car is moving. Here's a link to some audio of the sound with pics of the car/engine. http://youtu.be/Ws69du3k3VU

I'm sorry but I don't understand your answer. Specifically, I don't understand what you mean by "get codes" and I also am not sure what you are implying by "there's something in there of some use". Could you please clarify. And you're right, there is no check engine light on.